The Spanish starlet signed his first professional contract with the club last week and the reserve team boss is confident he will develop the work ethic necessary to make a big impression on Barclays Premier League football.
"He turned 17 on Friday and hopefully he has a bright future at the club," McMahon told Liverpoolfc.tv.
"He'll only have that future if he keeps working hard and listens to what the coaching staff are saying to him. But he knows that and we hope he will start working twice as hard now."
He added: "We are looking at developing the whole player here. He has good attributes going forward and in the wide areas but he still needs to learn the other side of the game.
"He needs to know about the discipline and work that's required in a team, like tracking back, tackling and staying with runners.
"By playing him in midfield, like we did with Pacheco last year, it will hopefully add that other side to his game."